The Joint Collaborative Team on Video Coding (jct-vc) of itu-t wp3/16 and iso/iec jtc 1/sc 29/wg 11 held its second meeting during 21-28 July, 2010 at the itu-t premises in Geneva, ch

JCTVC-B032 [M. Ueda, S. Fukushima (JVC)] TE1: Refinement Motion Compensation using Decoder-side Motion Estimation

In TE1 activity, Decoder-side Motion Vector Derivation (DMVD) tool has been evaluated for improving coding efficiency for HEVC.

This proposal focuses on the tool "Refinement Motion Compensation using Decoder-side Motion Estimation (RMC)". RMC was proposed in the previous proposal JCTVC-A108. The RMC tool aims to improve the quality of MC block in motion compensation process using DMVD process between reference pictures.

The RMC tool has been ported into TE1 codebase based on KTA2.6r1 because the first implementation was based on JM16.2 software. By the porting, the RMC tool has been available in TE1 activity.

Technique is for biprediction. One directioin MV is sent; the other is derived by this technique when indicated (flag per prediction block).

The simulation results show that the proposed technique provides the BD-bitrate savings of average 2% up to 3% for CS1 and 1.8% (2%, without class A case) up to 12% for CS2 under TE1 common conditions.

Decoding time 2.5x. Encoding time 1.6x.

It was remarked that the proposal was compared with IPPP coding, but this is a form of biprediction; thus it was suggest that it should be compared with forward-predictive B coding.